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Название: A (c. L* )-Geometry for the Sporadic Group J2
Авторы: Buekenhout F., Huybrechts C.
Аннотация:
We prove the existence of a rank three geometry admitting the Hall–Janko group J2 as flag-transitive automorphism group and Aut(J2) as full automorphism group. This geometry belongs to the diagram (c·L*) and its nontrivial residues are complete graphs of size 10 and dual Hermitian unitals of order 3.